Improvement in pumps



UNITED STATES PATENT OFFICE.,

A. LEUCHTWEISS, OF CINCINNATI, OHIO.

IMPROVEMENT IN PUMPS.

Specification forming part of Letters Patent No. 53,939, dated April 10, 1866.

To all whom 'it may concern:

Beit known that I, A. LEUeHrwEIss, of the city ot' Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and Improved Rotary Pump; and I do hereby de- Clare that the tollowingis a full, clear and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l represents a vertical section of this invention, the line a Fig. 3 indicating the plane of section. Fig. 2 is a horizontal section of the same, taken in the plane indicated by the line g/ y, Fig. l. Fig. 3 is an inverted plan of the cover of the pump-barrel or cylinder. Fig. 4 is a plan or top view of the same.

Similar letters of reference indicate corresponding parts.

This invention relates to a pump which is based on the principle of an archimedean screw, said screw being made to revolve in a barrel or cylinder which is open at the bottom, and provided with a closely itting top. Said top is hollow and furnished with one or more outlets, either on top or on its sides, and with one or more sharp-edged abutments, which extend close down to the ends or upper edges of the screw-blades, in such a manner that the liquid taken up by said screw-blades is, so to say, cut oft' by the edge of the abutment and forced to pass up into the hollow part of the cover and out through the delivering pipe or pipes, and that with this simple screw-pump water or other liquids can be forced up to a considerable height.

Arepresents a barrel or cylinder which is open at the bottom and provided with a closely, iitting top or cover, B. Said cylinder is bored out to receive the screw C, which is composed of two or more spiral blades of considerable pitch, and which is mounted on a vertical arbor, D, by which a rapid revolving motion can be imparted to the same.

lhe cover B is provided with a dischargepassage, a., leading to the delivery-pipe b, which emanates either from the top ofthe cover, as shown in the drawings, or which may be made to emanate from its side; and, it' desired, two or more discharge-passages may be made in the cover B. The lower edge ot' the discharge-passage a forms a sharp-edged abutment, c, which rests close over the top edges of the screw-blades, as clearly shown in Fig. l of the drawings, and as the screw revolves, the liquid taken up by the blades is cnt oi by said sharp-edged abutment and forced up into the passage ,whenee it is prevented from tlowing back by the constantly-succeeding quantities of liquids forced up by the screw, and a pump is thus obtained which is exceedingly simple in its construction, which requires no valve, and which can be used with great advantage as a ships pump or for breweries, distilleries,sugar-houses, and other similar manufactories, where the liquid to be raised is semi-Huid or mixed with foreign matter.

By the combination of the sharp-edged abutment with the screw I am enabled to force the liquid up to a considerable height with a comparatively small expenditure of power.

What l claim as new, and desire to secure by Let-ters Patent, is-

The sharp-edged abutment c, in combination with the discharge-passage a, screw C, and cylinder A, constructed and operating substantially as and for the purpose described.

AUGUST LEUoHTWEiss.

Witnesses:

W. HAUEE, M. M. LIVINGSTON. 

